LONDON — Severe thunderstorms affected parts of Europe and East Asia in June 2026, bringing heavy rain, strong winds and localized flooding, according to weather authorities and regional reports. Storm activity was reported across parts of the Balkans and Central Europe, while areas including Hong Kong experienced periods of intense rainfall and weather warnings.
In Europe, storms developed as warm, unstable air interacted with changing weather systems, according to weather reports. Slovenia was among the areas affected, with local authorities reporting strong winds and heavy rainfall. Reports said storms also moved through parts of Croatia, Bosnia and Herzegovina, and Greece during the period.
The Slovenian municipality of Komenda reported storm damage after hail and strong winds affected buildings, according to regional weather reporting. Officials and emergency services assessed damage, while details on the full extent of impacts remained unclear.
Germany also recorded severe weather incidents during June. The German Weather Service confirmed that a tornado moved through the city of Gronau in North Rhine-Westphalia earlier in the month, according to public broadcaster reports. Authorities said the broader weather situation included thunderstorms, heavy rain, hail and strong wind conditions in parts of the country.
In East Asia, Hong Kong issued severe rain warnings after periods of intense rainfall. Weather officials reported rainfall rates that exceeded normal levels during the affected periods, while authorities closed schools and suspended some activities as a precaution, according to regional weather reporting.
Hong Kong’s weather service has previously warned that severe rain events can cause flooding and disruptions, particularly in low-lying areas. Officials advised residents to monitor weather updates and follow safety instructions during periods of heavy rainfall.
Meteorological agencies have linked the storm activity to unstable atmospheric conditions, but the exact causes and longer-term patterns for individual storm events vary by location. Weather services typically issue warnings based on forecasts of rainfall intensity, wind conditions and the potential for flooding or other hazards.
European forecasters have continued monitoring areas where hot conditions and atmospheric changes may contribute to further thunderstorms. Reports noted that the risk of locally severe storms remained focused on specific regions rather than indicating a continent-wide event.
“We are seeing a pattern where hot air and storm systems can interact to produce locally intense weather,” meteorologists have said in regional weather briefings, while cautioning that storm impacts can vary significantly between locations.
As of Sunday, June 21, 2026, authorities in affected regions continued monitoring weather conditions and responding to local impacts. Further details on damage assessments and additional storm activity depended on ongoing reports from national weather agencies and emergency services.
